Chapter 1: Periodicity and Ionisation Energy

A-level ChemistryModule 3: Periodic Table & Energy7 topicsHigher

StudyStudy Material QuizQuiz ResourcesResources

Mock Papers

Exam-board mock papers

Mock papers launch from 1 August 2026. New papers will be added regularly from this date.

Dashboard tracking

Included with paid subject access

You can see the paper details now. Access unlocks when your plan includes this subject and tier.

Mock paperFeatured

Mock papers launch collection

alevel · chemistry · Module 3: Periodic Table & Energy · All papers

Releases 1 August 2026

Locked

Topic-aware long answers

Ultimate/Lifetime long-answer set

Ultimate and Lifetime users can create one saved set of 4 extended-response questions for this topic and mark answers with examiner-style feedback.

AI MCQ generation is available to paying students: 20 questions per session,2 sessions per month. Long-answer AI generation requires Ultimate or Lifetime access.

Free starter set

Module 3: Periodic Table and Energy: Periodicity and Ionisation Energy - Authored Long Answer Questions

Examiner-style long-answer practice with automatic marking, improvement advice and ProofCoach tracking.

4 questions25 marks37.5 min

standard / hard

6 marksdescribestandardOCR A

For Periodicity and Ionisation Energy, describe how successive ionisation energy and shielding applies to successive ionisation energy graph for sodium.

0 characters

Write your answer first, then mark it.

6 markscalculatehardOCR A

Using successive ionisation energy graph for sodium, calculate a relevant OCR A Periodicity and Ionisation Energy quantity and explain the physical or chemical meaning of the answer. Show equation, substitution, answer and unit.

0 characters

Write your answer first, then mark it.

7 marksexplainhardOCR A

Periodicity and Ionisation Energy: Electron removed (no.) vs Successive ionisation energy (kJ mol-1)

Loading graph...

The large jump between the 1st and 2nd ionisation energies of sodium confirms one outer electron in the 3s sub-shell. Later jumps mark removal from increasingly inner shells.

The graph for Periodicity and Ionisation Energy shows data from successive ionisation energy graph for sodium. Explain the pattern using the data and relevant chemistry principles.

0 characters

Write your answer first, then mark it.

6 marksevaluatestandardOCR A

In successive ionisation energy graph for sodium, evaluate the experimental method or model assumptions used when applying successive ionisation energy and shielding.

0 characters

Write your answer first, then mark it.

Subject MCQ Bank

20 stored MCQs for this topic

Paying students get 20 stored MCQs per generation session and 2sessions each month. Your set is saved here so you can reset and retake it without using another allowance. If the bank is running low, replenishment happens in the background.

The 20-question stored MCQ bank is premium-only. Free users can study the starter unit and standard quiz, but bank practice unlocks after purchasing the subject.

Loading practice tools...

Start of Module 3: Periodic Table & Energy

2. Group 2 and Group 7 Trends

Key learning objectives

Understand the key principles behind Periodicity and Ionisation Energy.
Apply these ideas to exam-style questions.
Recall the essential definitions and key terms.